Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c56e184ba23448b…

MALICIOUS

PDF

44.6 KB Created: 2020-08-30 04:40:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 48048bc9e383fc7ed448e279cf2c79e1 SHA-1: bf70e293d4b262e1d4076dff94650c5e32866642 SHA-256: 0c56e184ba23448bb687151a597f805d4f96fc6fd1dfc9852b9542364326f79c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, with a critical heuristic firing indicating it links to known malicious redirector infrastructure. The primary malicious URL identified is 'https://ttraff.com/wix?keyword=mazda+b2000+for+sale'. The document body, though heavily obfuscated, contains this URL and other benign-looking PDF filenames, suggesting a link farm or SEO manipulation tactic to drive traffic to malicious sites. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.com/wix?keyword=mazda+b2000+for+sale
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_8647b3c843e949dc9afb1a4109e3314e.pdf
    • https://static.usrfiles.com/ugd/e73fea_1a93b19f3367479eaf49d181bdcaa199.pdf
    • https://static.usrfiles.com/ugd/48d9a1_2abfba13d73f4587a8c3b537feffaa51.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kevaziretojigadogikoranab.pdf
    • https://cdn.shopify.com/s/files/1/0431/4890/2554/files/sweet_potato_pie_story.pdf
    • https://cdn.shopify.com/s/files/1/0434/5007/3240/files/watercolor_painting_tutorial_for_beginners.pdf
    • https://cdn.shopify.com/s/files/1/0431/5663/5816/files/47637181864.pdf
    • https://cdn.shopify.com/s/files/1/0431/5227/7670/files/ielts_listening_recent_actual_test_volume_1_audio.pdf
    • https://cdn.shopify.com/s/files/1/0433/4200/4375/files/50446639063.pdf
    • https://cdn.shopify.com/s/files/1/0431/6191/1458/files/com_samsung_vvm.pdf
    • https://static.usrfiles.com/ugd/26938b_3290a99383ea47f19b4a18d46a493aef.pdf
    • https://static.usrfiles.com/ugd/227d0f_6bd23258a6d640888628eccaa3c0594b.pdf
    • https://static.usrfiles.com/ugd/6c032c_4332ddf280974e0a9d26cc4d99f821aa.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006f3a.bin
2bb2dd382a44e854081de2bf7a3de591b152abb867d23654f2bf12dfeaccf15e
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F3A 5372 bytes
font_01_sfnt_off00008195.bin
59614e662de0b886b885ed876c74760c3e4d313724faacd907673054856d850f
pdf-font-stream PDF embedded font (sfnt) at offset 0x8195 10604 bytes